Which of the following statements regarding cyanobacteria is false?
a) once they oxygenated the atmosphere, cyanobacteria created conditions that were toxic to their own growth, and are now very rare.
b) while their common name is "blue-green algae", they are a member of domain bacteria.
c) cyanobacteria gave rise to the chloroplasts found in photosynthetic eukaryotes
d) they produce oxygen through photosynthesis photosynthesis most likely first arose in the cyanobacteria